Me pēnei te tohu i te whārangi:
Gerard Hutching, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/herons/media (accessed 27 April 2024)
He kōrero nā Gerard Hutching, i tāngia i te 12 Jun 2006, reviewed & revised 17 Feb 2015